Principles of Energy Management

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Green Building Council of Namibia
Glenn Howard – Emcon Consulting Engineers

The case for energy management in buildings
◦ Why?
◦ How much?
 Do we use?
 Can we save?
◦ Where can we save?
◦ What is the process?

Sustainability
◦ Reduce greenhouse gas emissions
◦ Reduce consumption of finite energy resources
◦ Migrate to infinite energy resources

Green Star Rating
◦ Demonstrate commitment to sustainability
◦ Provides a rigorous methodology

Business case?
◦ Is there a business case?
◦ If so, we have a winner that gets the horse (building
owner) to drink from the eternal river


Existing Building Performance (Pilot)
“Energy” category points = 27% of rating:
◦ Energy reduction – related to GHG emissions (25
points)
◦ Peak electricity demand reduction (2 points)

Add “Building Management” and “Water”
=
44%
1% New build & refurb
99 %
Existing Buildings
N$1.95M/annum
N$2.7M/annum
N$470k/annum
Market rentals
A-Grade offices 120-135 N$/m²
Commercial
180-300 N$/m²



Energy source (electrical, gas, diesel, paraffin, solar,
wood)
Air conditioning (HVAC) and refrigeration
Lighting
◦
◦
◦
◦




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Efficiency (luminaire and lamp)
Control
Daylight
Illumination levels
Water heating
Appliances
◦ Industrial engineering
◦ Energy rating (TCO – LCC)
Elevators & escalators
Computer energy saving modes
Power factor correction
Renewable energy
MAINTENANCE (Scheduled maintenance)
Etc.

When?
◦ New building – get it right first time
◦ Existing building – any time or at trigger
points:




sale of the property
change in the lease
replacement of equipment
refinancing, remodelling, renovation or
rehabilitation

Goals
◦ Lowest cost of energy
◦ Efficient energy use
◦ Use most appropriate technology

Ultimate goal
◦ Sustainability
◦ Zero net energy (ZNE) buildings

Systematic assessment of energy use
◦
◦
◦
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Sources
Where it is used
Variance between input and useage
Effectiveness and efficiency
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Broad organisational awareness
Monitor and measure
Energy management plan – short & long term
Integrated into organisation management
structure
Provide leadership (Champion) and a team
Top-down commitment expressed as policy
Energy is a manageable
expense
You can’t manage what you
don’t measure (and report on)
Thank you
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